Question about Stripe and Cashier

Here's an example of how I implemented a coupon input in a recent project, see if this can help you :) taking note of the withCoupon($coupon) method.

public function subscribe($token)
    {
        $id = Auth::id();
        $user = User::find($id);
        $coupon = Input::get('coupon');
        // Check if a coupon is present
        if (isset($coupon))
        {
            $user->subscription('test-sub')->withCoupon($coupon)->create($token,
            ['tax_percent' => 20.0,
                'email' => $user->email,
                'description' => 'Subscription'],
            null);
          
        }
        // If there's no coupon, continue with ordinary subscription
        else {
            $user->subscription('test-sub')->create($token,
                ['tax_percent' => 20.0,
                'email' => $user->email,
                'description' => 'Subscription'],
                null);
       
        }
        // Update the database with the returned StripeToken, that Stripe provide us with, to be used later
        // for resuming subscriptions etc.
        $user->stripe_token = $token;
        $user->update();

        return true;
    }

thanks. I have no issue subscribing my customers, I require them to subscribe before they can have an account (like here). My question pertains to implementing coupons with Cashier to existing customers who have either canceled their subscription and want to renew, or users who want to swap subscriptions. (both of which can be done directly on Stripe.com)

I want to be able to keep using the Cashier implementation due to its ability to update/set/cancel subscriptions.

Yes you could do a similar kinda thing as

$user->subscription('test-sub')->withCoupon($coupon)->create($token,
            ['tax_percent' => 20.0,
                'email' => $user->email,
                'description' => 'Subscription'],
            null);

By showing a "cancelled" customer a form to re-instate their subscription or storing the stripe token in your DB then when a cancelled customer clicks a button for example grab this from the DB and run it the same method to re-activate their account with a coupon. Hope that makes sense :)

what about coupons on a swap. Like a monthly user decides he wants to go yearly and we have a coupon for 15% off yearly while considering the user already has an active subscription. Should I cancel their subscription on the back end and then just create a new one? Will stripe and cashier know to append the new subscription with coupon to the remaining time from the existing monthly (and cancelled on backend) subscription?

When would I use the resume method?

\vendor\laravel\cashier\src\Laravel\Cashier\StripeGateway

You would effectively use the swap method, you can still use Stripe methods within Cashier even if they don't exist, always refer back to Stripe's docs if in doubt.

but from what I can tell the swap method doesn't accept the withCoupon method.

@lstables - I was messing around with stuff and found out you cannot charge the token more than once (the initial card setup or customer creation).

What I would essentially like is

$user->subscription('yearly')->withCoupon('15off')->charge();

but charge wants a token and I don't want to ask the user for their card again.

If a user is expired I want them to be able to choose a plan, and enter a coupon if they have one, and then charge the customer (card on file) not the token (card) because you cannot charge the token twice.

Well, looks like this will be the only way to do that.

// apply the coupon first to the customer on stripe
$user->applyCoupon('15off');
// coupon will then get applied to next action
$user->subscription('yearly')->resume();

I am hoping this will solve my issue

    public function postSubscription(Request $request)
    {
        // user has subscription, just wants to update
        if($this->auth->user()->subscribed() && ! $this->auth->user()->onGracePeriod())
        {
            // verify user is not on selected plan
            if ($request->input('subscription-plan') !== $this->auth->user()->getStripePlan())
            {
                if ($request->has('coupon-code')) {
                    $this->auth->user()->applyCoupon($request->input('coupon-code'));
                    $this->auth->user()->subscription($request->input('subscription-plan'))->swap();
                } else {
                    $this->auth->user()->subscription($request->input('subscription-plan'))->swap();
                }

                session()->flash('success_msg', 'Subscription updated successfully!');
                return redirect()->back();
            }
            session()->flash('error_msg', 'You are already on this plan! To apply a coupon to your next billing cycle go to the coupon page!');
            return redirect()->back();
        }

        // user isn't subscribed, resubscribe and check for coupon code
        if ($request->has('coupon-code')) {
            $this->auth->user()->applyCoupon($request->input('coupon-code'));
            $this->auth->user()->subscription($request->input('subscription-plan'))->resume();
        } else {
            $this->auth->user()->subscription($request->input('subscription-plan'))->resume();
        }
        session()->flash('success_msg', 'Subscription updated successfully!');
        return redirect()->back();

    }

Hi there,

@lstables - I just found your way to implement VAT with laravel cashier:

            $user->subscription('test-sub')->withCoupon($coupon)->create($token,
            ['tax_percent' => 20.0,
                'email' => $user->email,
                'description' => 'Subscription'],
            null);

I tried that by myself but I wasn't able to get it working. Currently I am in Stripes test mode and I am using the demo-cc with the number 4242 4242 4242 4242. Do you have any idea what I am doing wrong?

I would appreciate any help! Thanks mat

Do you have a plan in Stripe set up called "test-sub" ?

What about checking if the coupon is valid or not?

@WKMG

    try {
        $coupon = \Stripe\Coupon::retrieve($code);
        if($coupon->amount_off) {
            $price =  "$".($coupon->amount_off / 100).' '.$coupon->duration;
        } else {
            if( $coupon->duration == 'repeating' ) {
                $duration = '(' . $coupon->duration_in_months . ' months)';
            } else {
                $duration = '(forever)';
            }
            $price = $coupon->percent_off . '% for ' . $duration;
        }
        
        return ['valid'=>'true','message'=>$price];
        
    } catch(\Exception $e) {        
        return ['valid'=>'false'];
    }